US4320406A - Ink printing device for multi-colored printing of a recording medium - Google Patents

Ink printing device for multi-colored printing of a recording medium Download PDF

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Publication number
US4320406A
US4320406A US06/149,319 US14931980A US4320406A US 4320406 A US4320406 A US 4320406A US 14931980 A US14931980 A US 14931980A US 4320406 A US4320406 A US 4320406A
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US
United States
Prior art keywords
printing
ink
recording medium
jets
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/149,319
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English (en)
Inventor
Joachim Heinzl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INKJET SYSTEMS & Co KG GmbH
Siemens AG
Eastman Kodak Co
Original Assignee
Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US4320406A publication Critical patent/US4320406A/en
Assigned to INKJET SYSTEMS GMBH & CO. KG reassignment INKJET SYSTEMS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EASTMAN KODAK COMPANY
Assigned to EASTMAN KODAK COMPANY reassignment EASTMAN KODAK COMPANY CORRECTION OF RECORDATION OF ASSIGNMENT RECORDED AT REEL 7201, FRAMES 578-605 Assignors: INKJET SYSTEMS GMBH 7 CO.KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/50—Picture reproducers
    • H04N1/502—Reproducing the colour component signals dot-sequentially or simultaneously in a single or in adjacent picture-element positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2103—Features not dealing with the colouring process per se, e.g. construction of printers or heads, driving circuit adaptations

Definitions

  • the present invention relates to ink-jet printer units and, more particularly to an ink printing device for multi-colored printing.
  • a present printing device having a piezoelectrically operated printer head for an ink operated mosaic printing system is disclosed in U.S. Pat. No. 4,158,847.
  • an ink printing head is provided with a plurality of printing jets.
  • the jets each lie at the outlet of a delivery channel which is enclosed over a portion thereof by a cylindrical piezoelectric drive element.
  • a shock wave is generated in the jet channels and ink is injected in droplets from the jet onto a recording medium.
  • Ink flows to the jet channels from a common ink reservoir through a supply line and filters into a common ink distributor mounted adjacent the printing head.
  • Each of the jet channels is connected to the supply of ink in the distributor through a capillary filter device including a throttle plate provided with a number of restricted passages corresponding to the jet channels.
  • Such printing devices are able to display only a single color, such as black, on a recording medium.
  • many instances occur where a multi-colored presentation of characters or graphic patterns is desired.
  • three ink printing heads may be arranged next to one another which discharge droplets in different respective colors, such as magenta, yellow, and blue, and are constructed to apply their ink in succession onto the recording medium.
  • This sort of arrangement would be very cumbersome in a printing operation which includes frequent periods of acceleration and deceleration, as well as requiring about three times more space than a single printer head. Further, the increased expenditure involved in a series arrangement for achieving multi-colored printing is prohibited.
  • the present invention concerns the construction of a single printer head system for rendering multi-colored presentations on a recording medium.
  • a piezoelectrically operated printer head is formed with a plurality of printing jets connected by channels to an ink distributor space.
  • the distributor is divided into different sections, each section communicating with a prescribed plurality of jets.
  • the distributor chambers are separately supplied with ink from respective ink reservoirs.
  • the ink reservoirs may contain different colors, permitting a single ink printing head to effect a multi-colored presentation on a recording medium.
  • the printing jets on the printer head are arranged in groups of proximate jets. Each group is supplied with ink from a single reservoir.
  • the groups may be arranged in a vertical array with one another or, in the fashion of the printer head of U.S. Pat. No. 4,158,847, may be arranged into parallel offset lines having six jets in each line.
  • the groups may be formed from the lower, intermediate, and upper sets of four jet nozzles.
  • multi-colored printer system of the present invention utilizes three ink reservoirs which contain inks of the primary colors; i.e., magenta, yellow, and blue. Nevertheless, more or less ink reservoirs may be arranged in connection with the ink printing head. If a four-color print is required, a fourth reservoir may be utilized to contain a black ink.
  • a presentation location is repeatedly printed with various inks by the different group jets. The reiterative printing operation requires that the recording medium be indexed perpendicularly to the printing direction before the printing head moves onto the next presentation. Each index segment is of a length equal to the length of an area in which a group of printing jets is located.
  • the ink printing head preferably prints more than one line at a time. Perpendicular indexing of the printing head occurs at the end of one line and the beginning of the next line with the length of the index corresponding to the space between successive lines.
  • the recording medium can be printed in a forward or reverse direction.
  • the forward feed of the recording medium occurs at the end of a line.
  • FIG. 1 is a cross-sectional view through a printer head unit for printing multi-colored patterns on a recording medium in accordance with the present invention.
  • FIG. 2 is a front view of a jet plate for an ink printing head in accordance with the present invention.
  • the principles of the present invention are particularly useful in a piezoelectrically operated printer head generally indicated at 20 in FIG. 1.
  • the printer head 20 is part of an ink printing unit 21 which includes the printing head and an appurtenant ink supply 22.
  • the ink printing unit 21 may be arranged on the carriage of a known printing station to move in line fashion along a data carrier 1 to print a recording medium 2 mounted along the carrier in response to a conventional character generator (not shown).
  • a conventional character generator not shown
  • the ink printing unit 21 of the present invention enables the printing head to make multi-colored presentations on the recording medium 2, including alpha-numerical characters and graphical patterns, such as half-toned pictures.
  • the printer head 20 has a body 3 which consists of a single member in the form of a cass component of dielectric synthetic material containing several straight channels or passages 4 designed to receive a printing liquid or ink flow.
  • the passages 4 serve as jet channels and terminate at a discharge end in restricted orifices or jets 23 formed in a jet plate 5.
  • the printing head may contain twelve jets and jet channels 4 arranged in a pattern of two rows as illustrated in FIG. 2. Ink droplets are injected from the jets on paths perpendicular to the recording medium 2.
  • the jet rows define two parallel vertical planes.
  • Corresponding jet channels 4 extend rearward from the jet plate in diverging patterns along the planes.
  • each of the channels 4 communicates with a corresponding restricted passage 7 formed transversely through a throttle plate 6. During start-stop operations, these narrow bores 7 of the throttle plate prevent pressure fluctuations from having any effect on the printing jets.
  • Each jet channel 4 is concentrically surrounded therealong by a separate piezoelectric drive element 8. Upon application of a voltage to one or more of the drive elements 8, a channel portion is contracted to generate a pulse which causes ejection of an ink droplet from the jet plate 5 through a corresponding jet.
  • Ink is supplied to the jet channels 4 via ink manifold or distributor chambers 10 through 12 formed in an end portion 9 fitted at the rear of the printer head body 3. Each manifold chamber communicates respectively with a particular set of jet channels 4.
  • each of the manifold chambers 10-12 is connected through the throttle plate 6 with each of the manifold chambers 10-12.
  • the manifold chambers 10-12 are supplied with ink via corresponding supply lines 13 which are in fluid communication at their inlet ends with corresponding, individual ink reservoirs 14-16.
  • the ink reservoirs 14-16 are arranged one behind the other in a direction perpendicular to the recording medium 2 in the ink reservoir station 22 behind the printer head 20. This particular arrangement of the ink reservoirs serves to better balance the printing unit 21 and obviate pressure shocks upon acceleration of the printer along the carrier 1.
  • the ink reservoir station 22 includes three successive cup or pot portions serving as the reservoirs 14-16.
  • each reservoir Pressed in the bottom of each reservoir, is a rubber seal 17 which is penetrated by a respective hollow needle 18 when the ink reservoirs are assembled onto the printing unit 21.
  • the needles 18 extend respectively to the supply lines 13, thus producing the ink supply connection to the printing head 20.
  • Somewhere along the fluid supply path between the ink reservoirs 14-16 and their corresponding jet channels 4 are respective filter devices (not shown) which are provided to retain dirt particles in the inks.
  • the ink reservoirs 14 through 16 contain inks M,Y, and C of the primary colors megenta, yellow, and blue (such as cyan blue) respectively.
  • the ink M with the color megenta is supplied to an uppermost group of jets via the manifold chamber 10.
  • the ink Y with the color yellow is supplied to a middle group of jets through manifold chamber 11 and the ink C with the color cyan blue is separately provided to a lowermost group of jets via the manifold chamber 12.
  • the jets 23 are arranged in two parallel rows.
  • the magenta ink M is ejected from the uppermost four jets designated Set M; whereas the yellow ink Y discharges from the middle four jets identified as Set Y and the cyan blue ink C passes from the lowermost four jets grouped together as Set C.
  • the recording medium 2 is threaded around the carrier 1 and the ink printing head 20 is moved line-wise along the carrier. Passage of the printer head along the recording medium enables the totality of jets to print a composite line of the vertical length Z, represented by the distance between the uppermost and lowermost jet opening surfaces on the jet plate 5.
  • the line Z is represented on the recording medium 2 as consisting of three partial lines of the colors magenta, yellow, and cyan blue which are spaced apart from one another by a distance T.
  • the recording medium 2 is displaced perpendicularly to the printing direction by the width T of partial line.
  • the distance T corresponds to the vertical width between jet opening surfaces at the uppermost and lowermost ends of the jet groups on the plate 5. According, the recording medium 2 is printed at all locations with each of the individual colors supplied to the printer head 20.
  • Displacement of the recording medium 2 by a respective partial line T enables printing of the recording medium 2 not only in the primary colors magenta, yellow, and cyan blue, but also in secondary colors derived from the mixture of these primary colors by means of successive, superimposed printing.
  • the colors cyan blue and yellow are printed one over the other; for presenting a violet color, the colors magenta and cyan blue are printed one over the other; and for representing the color red, the colors magenta and yellow are printed one over the other.
  • Half-tone representations may be effected by control of the plurality of droplets printed one over the other and/or next to one another per surface unit of the recording medium 2.
  • the ink printing device 21 can print the recording medium 2 line-by-line in a forward direction and/or in the reverse direction. In each case, however, the recording medium 2 is indexed perpendicularly to the print line by a partial line distance T at the end of the composite line Z.
  • the recording medium may be printed in only one direction of motion of the ink printing head, wherein the recording medium 2 is indexed the distance T during the return movement of the printer head or is continuously indexed during the printing and during the return.
  • a four-color print may be provided by adding a fourth ink reservoir containing the color black in addition to the ink reservoirs containing the primary colors magenta, yellow, and cyan blue.
  • the fourth ink reservoir would be similarly connected to a particular plurality of jets. If an ink printing head were used with the four ink reservoirs or formed with the twelve jets; then, respective sets of three jets each would eject ink of the same color and each partial line distance T would be designated by the vertical width between upper and lower jet opening surfaces of a jet group. In this case, the composite line Z would be formed of four partial lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
US06/149,319 1979-06-26 1980-05-13 Ink printing device for multi-colored printing of a recording medium Expired - Lifetime US4320406A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2925812A DE2925812C2 (de) 1979-06-26 1979-06-26 Tintendruckeinrichtung zum mehrfarbigen Bedrucken eines Aufzeichnungträgers
DE2925812 1979-06-26

Publications (1)

Publication Number Publication Date
US4320406A true US4320406A (en) 1982-03-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US06/149,319 Expired - Lifetime US4320406A (en) 1979-06-26 1980-05-13 Ink printing device for multi-colored printing of a recording medium

Country Status (5)

Country Link
US (1) US4320406A (enrdf_load_stackoverflow)
EP (1) EP0021389B1 (enrdf_load_stackoverflow)
JP (1) JPS568266A (enrdf_load_stackoverflow)
CA (1) CA1158705A (enrdf_load_stackoverflow)
DE (1) DE2925812C2 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
JPS568266A (en) 1981-01-28
CA1158705A (en) 1983-12-13
DE2925812C2 (de) 1982-10-21
JPH0112675B2 (enrdf_load_stackoverflow) 1989-03-01
EP0021389B1 (de) 1986-01-29
EP0021389A1 (de) 1981-01-07
DE2925812A1 (de) 1981-01-15

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